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Differential D5200

Implement mergesort for the FreeBSD kernel.
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Authored by • hselasky on Feb 5 2016, 8:53 AM.
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imp
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gallatin
gnn
rstone
Summary

The sorting algorithm is optimized to sort a pointer array.

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rS FreeBSD src repository - subversion
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Event Timeline

• hselasky updated this revision to Diff 13049.Feb 5 2016, 8:53 AM
• hselasky retitled this revision from to Implement mergesort for the FreeBSD kernel..
• hselasky updated this object.
• hselasky edited the test plan for this revision. (Show Details)
• hselasky added reviewers: gallatin, gnn.
• hselasky set the repository for this revision to rS FreeBSD src repository - subversion.
Herald added a subscriber: imp. · View Herald TranscriptFeb 5 2016, 8:53 AM
• hselasky added a child revision: D4994: Make quicksort or mergesort configurable for the LRO code..Feb 5 2016, 8:55 AM
kbowling added a subscriber: kbowling.Feb 5 2016, 8:56 AM
• hselasky updated this revision to Diff 13051.Feb 5 2016, 9:26 AM

Added missed prototype.

• hselasky updated this revision to Diff 13052.Feb 5 2016, 9:43 AM

Re-add sys/conf/files deltas.

imp added a comment.Feb 5 2016, 2:56 PM

Why not just use quicksort?

• hselasky added a comment.Feb 5 2016, 3:33 PM

Because quicksort appears to be unpredictable with regard to how many times the function needs to recurse and how long the sorting can take.

See:
https://en.wikipedia.org/wiki/Quicksort

--HPS

• hselasky added a reviewer: rstone.Feb 5 2016, 3:33 PM
• hselasky abandoned this revision.Feb 10 2016, 7:16 AM

Revision Contents
Changeset List

PathSize
sys/
conf/
2 lines
libkern/
105 lines
28 lines
sys/
4 lines

Diff 13052

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sys/conf/files

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sys/libkern/mergesort.c

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sys/libkern/mergesort_r.c

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sys/sys/libkern.h

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